Shock-absorber.



J. A. MUKNIGHT. SHOCK ABSORBER. APPLICATION FILED FEB.27, 1914.

1, l QO,834. Patented Dec. 15,-1914.

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J. A. MoKNIGHT. SHOCK ABSORBER. APPLICATION FILED PBB.27, 1914.

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Patented Dec. 15, 1914.

J. A. McKNIGHT. SHOCK ABSORBER.

APPLICATION FILED FEB.2'7. 1914. 1,120, 34, Patented Dec. 15, 1914.

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- To all ibhom it may concern.-

Be it known that L Jorm A. McKNron'r, a citizen of the United States, residing at the city of Louisville, in the county of Jefferson, and State of Kentucky, have invented certain new and useful Improvements in Shock-Absorbers, of which the following is a specification.

This invention relates to improvements in devices, for relieving the shock due to vibration between the body and axle of a vehicle moving over rough or uneven sur; faces and is particularly adapted for use on motor vehicles.

An object sought is the provision of a device in which the application of resistance may at first be of increasing and then con.- stant degree following the springs recovery, as well as during its initial flexure.

Another object is the attainment of a more uniform reliability'assured through an avoidance of inefiiciency attributable to rapidly worn elements of construction.

A further object is the provision of a device of the character described that will be economical in construction and eiiicient in operation.

With the foregoing and other objects in view the invention consists of the novel construction and arrangement of parts illustrated in the accompanying drawings, comprising three sheets, which form a part of this specification, in which is set forth an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to that come within the scope of the. claims appended hereunto.

In the drawings, in which like reference characters indicate like parts in the several views; Figure 1, is an elevation of the in= vcntion as applied for use; Fig. 2, is a top plan view; Fig. 3, a view similar to Fig. 1,

on an enlarged scale, with parts removed and broken away: Fig. 4, a section on line XX of Fig. 1; Fig. 5, a perspective view of the drum casing; Fig. 6, a perspective view the male element; Fig. 7, a perspective view of the annular ring; Fig. 8, a perspective view of one of the outer brake Specification of Letters Patent.

UNUPED STATES PATENT OFFICE.

JOHN MCKNIGHT, 0F LOUISVILLE, KENTUCKY, ASSIGNOB, BY DIRECT AND MESNE ASSIGNMENTS, TO THE MILLNITE MFG. CO., A CORPORATION OF KENTUCKY.

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Patented Dec. 15, 1914.

Application filed February 27, 1914. Serial No..821,386.

shoes; Fi 9, a erspective view of one of the mner rake s oes.

Relatively rotatable elements -1 and --2 are adapted for attachment to two relatively movable parts of a vehicle, as the axle 3 and the chassis -4, through any practicable means. The element 1, conslsts of a drum, orycasing, open at one end and closed at the other by a head 9 having a central aperture -10. At the open end of the casing the side Wall is provided with an annular seat -11-; on the exterior of the side wall, near the open end of the drum there is an ear 12 having oppositely disposed recesses 13, l3 adapted for the reception of arm members -14, 14'.-,

the outer ends of said members are attached to alug -15 which carries a split sleeve 16, a bolt l7- providing means whereby any Wear of the sleeve may be taken up. A cover -18, having a central 23 from the head. lihe extension 23 is of such length as to clear the drum and carries on its outer end an ear -2 1- similar to the car 12 on the drum; the ear 24: has associated with it arm members 25, 25- attached to a lug 26 that is provided with a split sleeve -2'?- having an adjusting bolt 28. The height of the body 20 is less than that of the side wall of the drum.

A dish shaped cap 29 fits in the opening 19 in the cover 18 and reaches to, and is attached to the body 20 by means, such as screws 80. A flange -31-- on the cap 29 bears on the cover and serves to retain the element 2 within the drum casing of elementl.

It will be observed that assembled as described, the elements 1 and 2 are freely rotatable relative to each other.

The frictional arrangements will now be described:

An annular ring -32, disposed about the arms 21, has internal projections 33-- that extend between and are spaced from wall 8 than of the shoes 44, 45 with the ring said arms. On each face of said projections is a layer of sound deadening material 34- of'suitable nature such as felt, leather or other substance, that may be attached in any racticable manner, as illustrated it is p aced in dovetailed recesses 35. Two arms 37, 38- extend from the exterior of-the ring 32 into sliding contact with the wall 8. The ring 32 and conand outer shoes an nected pro ections are of the same height as the body 20, but at the outer ends of the arms are raised portions 37, 38 that reach the 'cover 18. Friction shoes 39, 40'- are disposed between the ring 32 and the wall 8. These shoes are arcuate in shape with the convex surfaces bearing on the wall. They are identical except that the shoe 40 is of greater length than the shoe 39. These shoes each comprise a thin curved wall -'41', having a stiffening flange 50-, joined at each end to solid abutments 42-. The abutments 42 have seats -'13 against which fit inner friction shoes 44, 45--, the concave faces of which bear on the ring 32. The inner shoes each comprise a curved wall 46-- stiflened by a flange -47-. A plurality of pressure members 48 are dis osed between the inner serve to force them respectively against the ring 32 and wall 8. The outer shoes 39, 40 are each provided on the ends thereof with a layer 49- of felt, leather or other suitable sound deadening material.

Therelatively rotatable elements 1 and 2 may be attached respectively to movable parts of a vehicle, as the axle and chassis, by means such as a bolt 5 passing through the sleeve 16 and engaging a suitable ear carried by the spring clip 7, and a bolt 6 passing through the sleeve 27 and engaging in the chassis.

In Fi 3 is represented the position of the mem ers of the shock absorber when the vehicle to which it is attached is traveling under normal conditions, over a smooth surface. It will be observed that the space between the arms 21 and the projections 33, on the ring 32, will alLow of a limited movement of the chassis. relative to the axle without bringing the friction devices into action. When the chassis approaches the axle a distance suiiicient to cause the arms 21 to impinge on the projections 33, the ring 32 will be carried therewith against the friction offered by the shoes 44 and 45. It is to beobserved that the friction couples comprising respectively the shoes 39, 44 and 40, 45, with associated springs 48,

offer resistance to the initial movement of the ring 32, but remain stationary relative-v to element 1 by reason of the larger area of frictional contact of shoes 39, 40 with the 32. Continued movement of the ring 32 will bring the arm 37 into contact with the end of shoe 39 and advance the couple, comprising the shoes 39, 44, as a unit, the friction between the ring 32 and shoe 44 ceasing as the friction between shoe 39 and the wall 8 becomes effective; the increase in resistance to torque being proportional to the difference between the areas of frictional contact of the shoes 44 and 39. A. continuance of the movement of the ring 32, due to the continued movement of the chassis relative to the axle, will bring the arm 38 against the end of shoe 40 and advance the couple of which it is a member bringing in the resistance of the shoe 40 with the Wall 8. On the rebound, or movement of the chassis from the axle, the sequence of actions is the same as above set forth, except that the arms 37 38 contact with the opposite ends of the shoes 39, 40. The facings 34 and 49 serve to prevent any metallic click as the various contacts are made.

It is thought that from the foregoing description the many advantages, as well as the operation of my invention will be clearly apparent without more extended description.

Having thus described my invention so that anyone skilled in the art pertaining thereto may make and use the same, I claim 1. In a shock absorber, a drum, a ring therein, a male member within the ring, a friction member between said ring and drum, means whereby said ring may be moved relative to said friction member by the male member without moving the friction member relative to said drum, and means whereby said ring may advance the friction member relative to said drum.

2. A shock absorber comprising a drum, a ring therein, a male member within the ring, a plurality of friction members positioned between said drum and ring, means whereby the male member may move said ring relative to said friction members Without moving said members relative to said drum, and means whereby said ring may advance said members relative to the drum.

3. A shock absorber comprising a drum, a ring therein, a male member within the ring, a plurality of friction members disposed between said drum and ring, means whereby said ring may be moved relative to said members without moving said members relative to said drum, and means whereby said ring may successively advance said members relative to the drum.

. herein, a male member within the ring, 1 cans for movlng said ring, a member lying between said drum and ring and being in tact with the drum being greater than that with the ring whereby said member will 4 resist relative-movement of the ring while remaining stationary relative to the drum, a projectlon on said ring adapted to contact with said member after a limited movementof the rin thereto and advance same relative to the um.

5. In a' shock absorber, a drum, a ring therein, a male member within the ring, means for moving said ring, a plurality of members lying between said drum and ring and bein "in frictional contact with each thereof, t e area of contact with the drum being greater than that with the ring whereby said members resist the relative movement of. the ring while remaining stationary relative to the drum, projections on said ring adapted to contact with said members and'advance same successivelv.

6.-1na shock absorber, a drum, a ring, means for moving said ring, a friction couple disposed between said drum and ring,

said couple comprising. inner and outer' members, springs positioned between and forcing said members respectively against said ring and drum, a projection on said ring adapted after a limited movement of the ring relative to said couple to engage and advance same relative to the drum.

7. In a shock absorber, a drum, a ring,

to be engaged y said male element, a friction member, disposed between and bearing on the peripheries ofvsaid ring and female element.

9. Relatively rotatable male and female elements, a ring disposed about and adapted to be engaged by said male element, a plurality of friction members bearing on the peripheries of and adapted to resist the relative movement of said ring and female element. I

10. Relatively rotatable male and female elements, a rin disposed about and adapted to be engaged y said male element after a limited movement relative thereto, a friction member bearing on the peripheries of male and female elements, a rin disposed about and adapted the ring and female element.

l1. Relatively rotatable male and female elements, a ring disposed about and adapti frictional contact therewith, the area of con: -ed to be engaged by said male element after a limited movement relative thereto, a plurality of friction. members bearing on the peripheries of and adapted to resist relative movement of said ring and female element.

12. Relatively rotatable male and female elements, a rin disposed within said female element and a apted to be engaged by said male element after a limited movement relative. thereto, a friction couple between and adapted to resist relative movement of said ring and female member, said ring adapted after a limited movement relative thereto to engage and advance said couple relative to said female element.

13. Relatively rotatable male and female elements, a rin disposed within said female element and a apted to be engaged by said male element after a limited movement rela- 4. In a shock absorber, a drum, a ring and adapted to resist relative movement of tive thereto, a plurality of friction couples said friction couples and advance same relative to the female element. v

14. Relatively rotatable male and female elements, a ringdisposed within said female member and about said male member being adapted to be engaged by said male member after a limited movement relative thereto, a plurality of friction couples of varying length arranged between. and adapted to resist relative movement of said ring and female element, said ring adapted after a limited movement relative thereto to successively engage said friction couples and advance same relative to the female element.

15. Relatively rotatable male and female elements, a ring concentrically arranged between said elements, a friction member disosed between said ring and female element, mternal and external projections on said rin said male element adapted to engage sai internal projections after a limited movement relative to the ring and advance same relative to the friction member, said external projection engaging said friction member after a limited movement of the ring relative thereto and advancing said memberrelative to the female member.

16. Relatively rotatable male and female elements, a ring concentrically arran ed between said elements, a plurality of riction members of varying length disposed between said ring and female element, a plurality of internal and external projections on said ring, said male member engagin "said internal projections, said externa same relative to the female element, said F. H. KAPPA.

projections successively contacting with and male element adapted to engage said ring advancing the friction members relative to and said ring engage said friction couples said female element. after limited movements relative thereto.

17. Relatively rotatable male and female JOHN A. MCKNIGHT.

elements, a 1mg arranged between sa1d elements, friction couples disposed about said Witnesses:

ring and adapted to resist the movement of W. H. CLARK, 

